Stencil-compasses.



E. J. BRASSEUR.

STENCIL COMPASSES.

APPLICATION FILED JAN. 26. 1916. 1 ,1 88,890. Patented June 27, 1916.

WITEE TATE% PATENT @FFICE.

ERNEST J. BRASSEUR, OF CHICAGO, ILLINOIS, ASSIGNOR TO A. B. DICK COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

STENCIL-COMPASSES.

Specification of Letters Patent.

Patented June 27, 13 16.

Application filed January 26, 1916. Serial No. 74,369.

To all whom it may concern Be it known that I, ERNEST .I. BnAssnUn, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Stencil-Compasses, of which the following is a specification.

My invention relates to improved beam compasses of a type particularly adapted for drawing circles upon stencil paper with a small wheel-stylus or rotatable disk.

The object of my invention is to produce a compass of the character described, which shall be efficient, easily adjusted and which can very readily be assembled or separated into its several parts for packing and shipment.

When a wheel-stylus is used with the compass, it has the advantages of not disturb ing or injuring the fibers of the stencil paper operated upon, and of making clear and distinct lines, while at all times it is maintained upright above the sheet.

The compass may also be used for drawing on ordinary drawing paper by substituting a section carrying a small lead or pencil point for the wheel-stylus.

Briefly, my invention comprises a beam on which are adjustably mounted a member carrying the center point, a member carrying a wheel-stylus or drawing device and a handle member intermediate the same and extending in the opposite direction. Since the handle member and the two arms referred to are all separable and adjustable, they may be easily slipped entirely off the beam and when replaced may be positioned at any desired points. In operation, the handle member is usually positioned near the wheel-stylus, so that the pressure of the hand of the operator will firmlybear upon the stylus. When it is desired, however. to make a rather large circle lightly and quickly, it may be found more convenient and efiective to position the handle member close to the center point.

My. invention also comprises improved details of construction in the compass.

In order that a clearer understanding of my invention may be had, attention is hereby directed to the accompanying drawings forming part of this application and illus trating preferred embodiments of my in vention.

In the drawings, rigure 1 represents a side elevation of the improved beam compass assembled, Fig. 2 is a cross-section on line 2-2 of Fig. 1, through a portion of the handle member, Fig. 3 is an end view of the wheel-stylus-carrying member mounted on the beam, Fig. .t is a cross-section on line 1-sl of Fig. 1, showing the center pointcarrying arm and Fig. 5 is a vertical section on line 55 of Fig.

Referring to the drawings, the beam 1 having parallel upper and lower edges is preferably formed of steel. The arm 2 carrying the wheel-stylus or disk 3 rotatably mounted on a stud l, the arm 5 carrying center point 6 and the handle member 7 are adjustably mounted on beam 1. Arm 2 is preferably formed U-shapcd with an arm 8 parallel to the longer arm which carries the stylus and with a horizontal top portion 9. The two arms of the U-shape are provided with vertical slots through which the beam 1 slidably extends, as is shown in Fig. 3. A horizontal bearing member 10 extends through the slots and rests upon the upper edge of beam 1, against which it may be pressed by screw 11, which is threaded in the yoke 9 of the arm, which screw is tightened when the arm is to be held in adjusted position. The arm 5 .is similar to the arm 2 and is formed U-shaped with a vertical side portion 12 parallel to the main arm 5, through slots in both of which beam 1 extends. The bearing member 13 extends through the slots in the two vertical arms and rests upon the top of beam 1. This member, which is the same as member 10 described in connection with the arm 2, is clearly shown in Fig. 5. in which the ends of l'iearing member 13 are shown to he clenched about the ends of the yoke portion 11 of the U-shape. through which adjusting screws 15 extends into contact with member 13. The center point 6 is adjustably secured within a clamp 16 which embraces the arm a and is held in adjusted position by the screw 17 extending through the yoke portion of the clamp.

The handle member 7 is formed with U- shaped frame 18, having a yoke portion 19.

through which extends the adjusting screw 20, which is adapted to bear against the hearing member 21, which. latter is positioned against the adjacent edge of beam 1 and is secured to the U-frame m the same manner as bearing members 10 and 13, al-

ready described. The beam extends slidably through vertical slots in the side portions of the U-frame in the same manner as already described in connection with arms 2 and 5. The upper ends of the vertical portions of the U-frame 18 are pressed together to lie parallel, as shown at 22, 22 in Fig. 1, the portions 22, 22 being forced into and secured within a ferrule or tube 23, which is secured to the end of a handle 24: of sutlicient length, which may conveniently be similar to the handle of a pen-holder, or the like. The adjusting screws 11, 15, 17 and 20 are provided with knurled heads for convenient manipulation.

When itis desired to take the device apart for packing, the screws 11, 15 and 20 are loosened and the handle member and arms 2 and 5 slipped off beam 1, in which case the center point 6 may also be removed if desired from arm 5. When the device is as sembled, arms 2 and 5 are positioned, as desired, and arm 2 repositioned at desired distances from the center point as the work requires. As stated, the handle member is usually positioned close to the stylus-bear- 7 ing arm, when a wheel-stylus is used on stencil paper, in order that sufficient pres sure may be exerted directly above the wheel-stylus. The provision of the U- shaped arms, together with the bearing members 13, etc, which lie flat upon the edges of the beam 1 and therefore distribute the pressure of the adjusting screw evenly along the edge of the beam, insures a firm and non-slipping adjustment of each movable member of the compass.

Having now particularly described my invention, what I claim and desire to protect by Letters Patent is as follows 1. In compasses adapted to operate upon stencil paper, the combination of a beam,

an arm carrying a center point and an arm carrying a j ournaled disk, extending on one side of said beam, and a handle member intermediate said arms, extending on the other side of said beam, said arms and member being slidably mounted on said beam, and means for securing said arms and member in adjusted position, to said beam, substantially as set forth.

2. In compasses adapted to operate upon stencil paper, the combination of a beam, arms carrying a center point and a marking device, extending on one side of the beam, and a handle 'member intermediate said arms, extending on the other side of said beam, said handle member and one of said arms having U-shaped portions slidably mounted on said beam, and clamping screws for securing said U-shaped portions in desired positions, substantially as set forth.

In compasses adapted to operate upon stencil paper, the combination of a beam, arms carrying a center point and a. marking device, extending on one side of the beam, and a handle member intermediate said arms, extending on the other side of said beam, said handle member and one of said arms having U-shaped portions having slots through the legs thereofthrough which the beam slidably extends, a bearing member extending through each said slot, adapted to bear against an edge of said beam, and

a clamping screw extending through the transverse portion of each U-shaped portion,

adapted to contact the bearing member thereof, substantially as set forth.

This specification signed and witnessed this 21st day of January, 1916.

ERNEST J. BRASSEUR.

lVitnesses:

H. H. lViUrrAN, Josnrrr TEAL.

Copie: of thil patent may be obtained for five cents each, by addressing the "Commissioner of Patents. Washington. D. 0. 

